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Planetary Science

Planetary Science is the study of Planets and the Solar System, a combination of Astronomy and Earth Sciences. Find questions about the different planets and more.

25,144 Questions

What is allowable eccentricity for pile?

Concrete piles cannot be driven at precise intended location; This is true for bored piles also.

For practical reasons various country design codes restrict the permissible deviation. In Indian code this value is specified as 75 mm.

This plays important role in pile-cap design. The deviation smaller than this will never be reported.

So pile cap sizing needs to be based on the worst possible direction deviation.

The pile eccentricity is one of the important aspects in pile cap shear strength calculation as well as pile cap reinforcement calculation.

Which planet has not made a complete orbit around the sun?

The planets have been orbiting the Sun for a very long time. However, Neptune has the longest year, about 165 Earth-years long, and since it was only discovered in 1846, 166 Earth-years ago, it has only made one orbit since it was discovered.

Is venus one of the biggest or smallest planet?

ONE of the smallest but brightest............same size as earth (about)

Would you expect all planets in the solar system to be made of similar materials?

No, each planet in the solar system forms from a unique set of conditions, leading to a variety of compositions. For example, gas giants like Jupiter are mostly composed of hydrogen and helium, while terrestrial planets like Earth have more rock and metal. The differences in size, distance from the sun, and formation history contribute to the varying materials found on each planet.

Which planets have atmospheres?

All planets in our solar system have atmospheres, but their compositions and characteristics vary. For example, Venus has a thick and toxic atmosphere primarily composed of carbon dioxide, while Mars has a thin atmosphere mainly made up of carbon dioxide. Earth's atmosphere is mostly nitrogen and oxygen. Gas giants like Jupiter and Saturn have thick atmospheres composed mostly of hydrogen and helium.

The outer most planet is?

Most say Neptune. Pluto isn't a planet, but counting dwarf planets, Eres. A little dwarf planet far beyond the reach of the sun, but still orbiting the sun.

How has your kowledge on the solar system affect your life?

Understanding the solar system has deepened my appreciation for the vastness and complexity of the universe, making me feel more connected to our place in it. It has sparked a sense of wonder and curiosity that motivates me to learn more about astronomy and our place in the cosmos. Overall, it has enriched my perspective on life and our place in the universe.

How many suns would fit in Pollux?

Pollux is an orange giant star in the constellation of Gemini.

It is about 8 times larger than our Sun, so about 512 Suns would fit in Pollux

As the amount of sunlight you see reflected increases what does it increase?

This is a question where the meaning isn't totally clear.

Perhaps it's a reference to "albedo".

Albedo is a measure of the fraction of light reflected by planets, etc.

The more sunlight that is reflected, the higher is the object's albedo.

For example, the brilliant planet Venus has a very high albedo.

How long it would take to go 4900 light years?

At the speed of light, it would take 16.6 years. Since it takes 4,700 years instead, your speed must be

(16.6/4700) times the speed of light.

(186,282) x (16.6/4700) = 657.9 miles per second = 2,368,600 miles/hour (rounded

(300,000) x (16.6/4700) = 1,059.6 km/sec = 3,814,500 km/hour (rounded)

How did the vikings navigate by the sun and stars?

Vikings used a tool called a sun compass, which helped them determine the direction of the sun even when it was hidden by clouds. They navigated by the stars using constellations such as the North Star to help them find their way. Additionally, they were skilled at observing natural signs like wind patterns and bird migrations to aid in navigation.

How money planets are there in your solar system?

There are eight planets and five dwarf planets in our solar system.

Which planets take the most time to orbit the sun?

I;m not completely sure but Neptune would make the most sense because its a cold planet and it has the largest orbital path. If Pluto was still considered a planet then my answer would be Pluto.

What inner planets have no moon?

Mercury has no moons

Venus has no moons

Earth has 1 moon (Of course)

Mars has 2 moons

And that's all the inner planets

HOPE IT HELPED :)

How does heat from the sun all day thousands of miles away heat your body?

The sun's energy reaches Earth in the form of electromagnetic radiation, including infrared rays that carry heat. When these rays hit your body, they are absorbed and converted into heat, raising your body temperature. Additionally, the atmosphere traps some of this heat close to Earth's surface, contributing to the warmth you feel.

What happens when you get out of Earths gravitational pull?

When you reach beyond Earth's gravitational pull, you enter outer space. Objects in space continue to be influenced by the gravitational forces of other celestial bodies such as the sun, planets, and stars. Becoming free from Earth's gravitational pull allows spacecraft to travel to other planets and explore the universe.

What are the planets that are far from the sun?

the planets away from the sun are called outer planets. They are Jupiter, Saturn, Uranus, Neptune, and if you consider it a planet Pluto.

Identify the characteristic that makes lo a unique moon in the solar system?

Io is unique in the solar system due to its intense volcanic activity, which is driven by tidal forces from Jupiter's gravity. This activity creates a constantly changing landscape of colorful sulfur-rich lava flows and volcanic plumes. Additionally, Io has a thin atmosphere composed mostly of sulfur dioxide.

Is the sun a lower case star?

I think you're asking if the Sun should be in upper or lower case.

If referring to the star at the centre of our Solar System, then the Sun is in upper case. If you're referring to a sun outside of our Solar System then it is in lower case.

What is the population of the planet Mars?

There is currently no known population on Mars as it is uninhabited by humans. Various space agencies and private companies are working towards sending humans to Mars in the future, but no humans have reached Mars yet.

How many minutes it takes light from there sun to reach the earth?

With the simple equation: Rate*Time=Distance. Since you need to find the time it would be: Time=Distance/Rate. The sun is approximately 93 million miles from the Earth and the speed of light is approximately 186000 miles per second. So you would take 93000000/186000, which equals 500. It takes about 500 seconds(around 8 minutes) for the Sun's light to reach Earth.

What is the name of the man who discovered that the sun was alive?

The man who proposed that the Sun is alive was José Comas Sola, a Spanish astronomer. He suggested this idea in the early 20th century based on his observations of the Sun's behavior and structure. His hypothesis was met with skepticism and has not been widely accepted by the scientific community.

What is true about the length of a planets day?

The days on Earth are determined by our rotational period. On other planets the rotatinal speed is different, and other factors can make the "solar day" (sunrise to sunrise) very different.

Rotational periods (for the core if a gas giant):

Mercury: 58.646225 Earth days

Venus: 243.0187 Earth days

Earth: 0.99726968 Earth days

Mars: 1.02595675 Earth days

Jupiter: 0.41354 Earth days

Saturn: 0.44401 Earth days

Uranus: 0.71833 Earth days

Neptune: 0.67125 Earth days

These are the rotation periods or "sidereal days", given in Earth "solar days" (of 24 hours)

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Calculating the solar day length

The length of a planet's "day" is normally determined by its rotational speed, which varies and is fastest on the larger planets. For two inner planets, the rotation is so slow that the "solar day" (sunrise to sunrise) is determined primary by their revolution around the Sun. For Uranus, its tilt means that the day or night is determined by its 84 Earth year orbit around the Sun.

Mercury: solar day is 176 Earth days

rotates once every 58.6 Earth days - (day is twice the length of its year)

Venus : solar day is 116.75 Earth days

rotates once every 243 Earth days, east to west - (its year is 224 Earth days).

Earth: solar day is 24 hours

rotates once every 23.93 hours (Earth rotates 366.25 times a year)

Mars : solar day is 24.6 Earth hours

rotates once every 24.66 Earth hours (the much longer year means the number of rotations roughly equals the number of days)

Jupiter : solar day is 9.925 Earth hours

rotates once 9.925 earth hours -(the atmosphere in the equatorial regions takes only 9.84 hours to rotate - it is a gas planet and the clouds are not attached to the core below)

Saturn :solar day is 10.65 Earth hours

rotates once every 10.65 Earth hours - clouds in equatorial regions take only 10.23 hours to rotate)

Uranus : solar day is 42 Earth years

rotates once every 17.24 Earth hours - (the planet is tipped on its side - each pole spends 42 Earth years in sunlight or darkness)

Neptune : solar day is 12 to 18 Earth hours

rotates once every 16.1 hours (the gases of Neptune's atmosphere rotate fastest at the poles: 1.5 times faster than at the equator)

Which planet was studied by mariner 10 probe and has a crater pitted surface?

The Mariner 10 probe studied the planet Mercury, which has a crater-pitted surface due to impacts from asteroids and comets over billions of years.